Fig. 2: Synthesis and characterization of precursor 1 and compounds 2a–2h.
From: Synthesis of metalla-dual-azulenes with fluoride ion recognition properties
a and b Synthesis of compound 1 and preparation of 2a–2h by reactions of 1 with different alkynes. c X-ray structures for the cations of compounds 1, 2a–2d (thermal ellipsoids drawn with 50% probability, the phenyl groups in PPh3 and isopropyl groups in −CH = N+(iPr)2 were omitted for clarity) and the selected bond lengths (Å) for 2a–2d. Selected bond distances (Å) for 1: Ir1–C1 2.183(4), Ir1–C7 2.139(4), C1–C2 1.362(6), C2–C6 1.447(5), C6–C7 1.362(6), C2–C3 1.468(6), C3–C4 1.398(6), C4–C5 1.519(6), C5–C6 1.530(6).
